package homework;

public class Day04Extended {
    public static void main(String[] args) {
        /*
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入一个整数：");
        int input = scan.nextInt();
        if(input>0){
            System.out.println("这是一个正数：+");
        }else if(input<0){
            System.out.println("这是一个负数：-");
        }else{
            System.out.println("这个数是0");
        }
        */
        /*
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入年份：");
        int year = sc.nextInt();
        System.out.println("请输入月份：");
        int month = sc.nextInt();
        int day =0;
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                day = 31;
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                day = 30;
                break;
            case 2:
                if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
                    day = 29;
                }else {
                    day = 28;
                }
        }
        System.out.println(year+"年的"+month+"月共"+day+"天");
        */
        int count = 0;
        for(int year=1900; year<=2023; year++) {
            if ((year%4==0 && year%100!=0)||year%400==0) {
                System.out.println(year+" ");
                count++;
                if(count%10==0) {
                    System.out.println();
                }
            }
        }
    }
}
